Little brown bats, during the fall swarm around hibernacula entrances.

“小型棕蝙蝠在秋天准备进入冬眠。

But recently, little brown bats in New York have stopped declining.

不过最近，纽约小型棕蝙蝠的数量已经停止下降。

The little brown bat was once abundant in the eastern U.S.

过去15年，美国东部地区曾有大量的小型棕蝙蝠。

These results, that little brown bats have developed resistance, are really encouraging to think about.

“这些结果表明，小型棕蝙蝠产生了抗体，这真的令人欢心鼓舞。

Pterosaurs came in lots of sizes, the smallest being about the size of a brown bat.

翼龙有很多种体型，最小的只有一只棕色蝙蝠那么大。

They faced off the modified moths with big brown bats in a flight room and captured the results on high-speed cameras.

他们在飞行室里用大棕色蝙蝠对抗改良飞蛾，并在高速摄像机上捕捉到了结果。